What course of action should the U.S. take?

[lweiger at umich.edu]

Earlier, I posed a similar question in the more general "when to respond 
tit-for-tat and when to turn the other cheek" form.  I haven't gotten any 
responses.  Assuming that Bin Laden is responsible (along with possible 
collusion from certain Arab states), what is the moral course for the US to 
follow (regardless of the fact that the Bush will not take it)?

-- Luke